A new selective fading model - Application to propagation data

Channel transmission models for use in estimating the performance of radio systems on line-of-sight paths at 6 GHz are explored. The basis of the study is the simple three-ray multipath fade; it is shown that the simple three-path fade model is indistinguishable from a perfect model of a line-of-sight microwave channel. The propagation data that confirm the model were obtained in summer 1977 from a 26.4 mile hop near Atlanta, Georgia. The received power at 24 sample frequencies spaced at 1.1 MHz and centered at 6034.2 MHz was continuously monitored and recorded during periods of anomalous behavior. The model was used to estimate the statistics of the channel delay difference.